The Contractor shall provide the following services, as requested by Urban Forestry: • Work Request/Work Order Pruning • Proactive Block Pruning • Palm Pruning • Tree Removal • Crane Services • Storm/Emergency Work Crew Services Tree care operations shall be in accordance with current standards as established by the American National Standard Institute (ANSI). Specifically, current ANSI A300 (Tree, Shrub and Other Woody Plant Maintenance-Standard Practices), ANSI Z133 (Safety Requirements for Arboricultural Operations) and accompanying International Society of Arboriculture "Best Management Practices" publications shall be adhered to. With the exception of work requested on a time and materials basis, all pruning orders shall be based on complete pruning of the entire tree. A. Tree Pruning Work orders for proactive block pruning are based on street block areas within the City of Davis boundaries. Generally, proactive block pruning areas are planned as contiguous areas. Work orders for demand-based pruning are based on service requests with specific objectives in various locations within the City of Davis boundaries and may or may not be at contiguous locations. Notwithstanding the referenced ANSI standards, trees and palms shall be pruned as follows: 1. Mature Trees Unless otherwise directed by the Urban Forestry representative, the Contractor shall use a combination of removal and reduction cuts in the application of the natural pruning system to conserve the characteristic growth patterns of each tree and achieve the following objectives for mature trees: a. Remove dead branches that are greater than 1 inch at the point of attachment. b. Remove diseased, decayed, broken, weakly attached, and/or crossing branches. c. Remove mistletoe and/or vines growing on the tree. d. Improve or maintain tree health, form, and structural integrity, to maximize safety and optimize the aesthetic and environmental benefits of each tree. e. Provide at least 14 feet of vertical clearance over roadways. f. Provide at least 8 feet of vertical clearance over sidewalks and pedestrian pathways. g. Provide 5 feet of vertical clearance over buildings and other structures and 5 feet of horizontal clearance from items such as, but not limited to, chimneys, antennas, alarm boxes, and utility service connections...
